A screen shows a thermal imaging system to take the corporal temperature of the passengers inside the Paris Charles de Gaulle airport to identify people potentially infected with the coronavirus disease (COVID-19) in Roissy-en-France near Paris, France, May 14, 2020. REUTERS/Charles Platiau

A poster indicates the set up of a thermal imaging system to take the corporal temperature of the passengers inside the Paris Charles de Gaulle airport to identify people potentially infected with the coronavirus disease (COVID-19) in Roissy-en-France near Paris, France, May 14, 2020. REUTERS/Charles Platiau

A screen shows a thermal imaging system to take the corporal temperature of the passengers inside the Paris Charles de Gaulle airport to identify people potentially infected with the coronavirus disease (COVID-19) in Roissy-en-France near Paris, France, May 14, 2020. REUTERS/Charles Platiau

A screen showing a thermal imaging system is seen as Israel's airport authority announced a pilot programme revealing what passengers leaving Israel should except as air travel gradually returns to normal after weeks of bare minimum flights due to the coronavirus disease (COVID-19) outbreak, at Ben Gurion International Airport, in Lod, near Tel Aviv, Israel May 14, 2020. REUTERS/Ronen Zvulun

A member of the voluntary ambulance service organisation DYA (Detente y Ayuda) uses a thermal imaging camera to take the temperature of a train passenger, as half of Spain enters 'Phase 1' with the easing of one of Europe's strictest coronavirus disease (COVID-19) lockdowns, in Bilbao, Spain, May 11, 2020. REUTERS/Vincent West

A member of the voluntary ambulance service organisation DYA (Detente y Ayuda) uses a thermal imaging camera to take the temperature of a train passenger, as half of Spain enters 'Phase 1' with the easing of one of Europe's strictest coronavirus disease (COVID-19) lockdowns, in Bilbao, Spain, May 11, 2020. REUTERS/Vincent West

A member of the voluntary ambulance service organisation DYA (Detente y Ayuda) uses a thermal imaging camera to take the temperature of a train passenger, as half of Spain enters 'Phase 1' with the easing of one of Europe's strictest coronavirus disease (COVID-19) lockdowns, in Bilbao, Spain, May 11, 2020. REUTERS/Vincent West

A member of the voluntary ambulance service organisation DYA (Detente y Ayuda) uses a thermal imaging camera to take the temperature of a train passenger, as half of Spain enters 'Phase 1' with the easing of one of Europe's strictest coronavirus disease (COVID-19) lockdowns, in Bilbao, Spain, May 11, 2020. REUTERS/Vincent West

A police officer wears a "Thermal Corona Combat Headgear" to monitor the temperature of commuters at a police check post, during a nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India May 11, 2020. REUTERS/Adnan Abidi TPX IMAGES OF THE DAY

A screen shows a thermal imaging system taking the corporal temperature of a customer carrying bags at the entrance to a reopened commercial center, following the coronavirus disease (COVID-19) outbreak, in Santiago, Chile April 30, 2020. REUTERS/Ivan Alvarado

Evan Steiner, who sells surveillance equipment in California through his firm EnterActive Networks LLC, attend an interview about the use of thermal imaging cameras, including those made by Dahua Technology, in San Francisco, California, U.S. April 24, 2020. Picture taken April 24, 2020. REUTERS/Nathan Frandino

A temperature screening area is set up in an office to demonstrate the use of Dahua Technology's thermal imaging cameras in San Francisco, California, U.S. April 24, 2020. Picture taken April 24, 2020. REUTERS/Nathan Frandino

A Dahua Technology thermal imaging camera is seen during a demonstration of the camera at an office in San Francisco, California, U.S. April 24, 2020. Picture taken April 24, 2020. REUTERS/Nathan Frandino

A temperature screening area is set up for a thermal imaging camera made by Zhejiang Dahua Technology Co., Ltd during a demonstration in San Francisco, California, U.S. April 24, 2020. Picture taken April 24, 2020. REUTERS/Nathan Frandino

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A screen shows a thermal imaging system taking the corporal temperature of health workers inside a public hospital to identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A screen shows a thermal imaging system taking the corporal temperature of health workers inside a public hospital to identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

Taiwan Foreign Minister Joseph Wu (C) attends a ceremony for the donation of thermal imaging cameras to Taiwan's Pacific allies, in Taipei, Taiwan April 15, 2020. REUTERS/Ben Blanchard

A combination photo shows (top) the empty Brandenburg Gate during coronavirus disease (COVID-19) outbreak in Berlin, Germany, March 25, 2020 and the same spot (bottom) in Berlin in this March 11, 2020 file photo. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination photo shows (top) the empty platform of an U-Bahn underground train at Alexanderplatz station during coronavirus disease (COVID-19) outbreak in Berlin, Germany, March 25, 2020 and the same spot (bottom) in Berlin in this March 11, 2020 file photo. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

Turi Paz who is from Honduras, warms herself up with a thermal blanket as she waits with other asylum seekers to be transported to a holding facility for migrants, where they can then make an application to claim asylum, after they crossed the Rio Grande river into the United States from Mexico, in Penitas, Texas, U.S., April 1, 2019. Border patrol agents on the scene distributed the blankets as the weather became cold. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Turi Paz who is from Honduras, warms herself up with a thermal blanket as she waits with other asylum seekers to be transported to a holding facility for migrants, where they can then make an application to claim asylum, after they crossed the Rio Grande river into the United States from Mexico, in Penitas, Texas, U.S., April 1, 2019. Border patrol agents on the scene distributed the blankets as the weather became cold. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Commuters wait for an U-Bahn underground train at Alexanderplatz station as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows people at Kurfuerstendamm boulevard as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

People are pictured at Kurfuerstendamm boulevard as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows people at a bus stop on Kurfuerstendamm boulevard while Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

People stand at a bus stop on Kurfuerstendamm boulevard as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows commuters at main train station Hauptbahnhof as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

Commuters are pictured at main train station Hauptbahnhof as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows people in front of the Brandenburg Gate as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

People are pictured in front of the Brandenburg Gate as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows commuters waiting for an U-Bahn underground train at Alexanderplatz station while Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

Commuters waiting for an U-Bahn underground train at Alexanderplatz station as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A helicopter from the Malaysian Police Air Wing Unit, equipped with a surveillance thermal imaging camera, participates in a search and rescue operation for 15-year-old Irish girl Nora Anne Quoirin who went missing from a resort in Seremban, Malaysia, August 8, 2019. Picture taken on August 8, 2019. REUTERS/Lim Huey Teng

Coal is seen at a warehouse of the Trypillian thermal power plant in Kiev region, Ukraine November 23, 2017. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY

A pile of coal is seen at a warehouse of the Trypillian thermal power plant, owned by Ukrainian state-run energy company Centrenergo, in Kiev region, Ukraine November 23, 2017. Picture taken November 23, 2017. REUTERS/Valentyn Ogirenko

Steam rises from the chimneys of a thermal power plant behind the Ivan the Great Bell Tower in Moscow, Russia January 9, 2018. REUTERS/Maxim Shemetov TPX IMAGES OF THE DAY

Steam rises from the chimneys of a thermal power plant in Moscow, Russia January 9, 2018. REUTERS/Maxim Shemetov

Two women wrapped in thermal blankets stand near the Manchester Arena, where U.S. singer Ariana Grande had been performing, in Manchester, northern England, Britain, May 23, 2017. REUTERS/Andrew Yates TPX IMAGES OF THE DAY

Mamahba, 17, from Guinea is covered with thermal blankets aboard the former fishing trawler Golfo Azzurro of the Spanish NGO Proactiva Open Arms following a rescue operation near the coasts of Libya in the central Mediterranean Sea, February 3, 2017. REUTERS/Giorgos Moutafis TPX IMAGES OF THE DAY

Migrants are covered with thermal blankets following a rescue operation of 104 sub-Saharan migrants aboard an overcrowded raft by the Spanish NGO Proactiva Open Arms, in the central Mediterranean Sea, 24 miles north of the Libyan coastal city of Sabratha, January 27, 2017. REUTERS/Giorgos Moutafis TPX IMAGES OF THE DAY

An Autel Robotics X-Star drone with a FLIR Duo module is shown during the 2017 CES in Las Vegas, Nevada, U.S., January 6, 2017. The module is a compact dual-sensor thermal and visible light imager. REUTERS/Steve Marcus

A worker cleans near a poster of the late Chairman Mao Zedong at a thermal power plant of the Nanjie Cun Group in Nanjie village of Luohe city in China's central Henan province September 25, 2012. REUTERS/Jason Lee/File Photo FROM THE FILES PACKAGE - SEARCH "MAO'S PRESENCE" FOR ALL 18 IMAGES

The logo of France's state-owned electricity company EDF is seen next to the Electricite de France (EDF) thermal electricity production plant in Cordemais, France, April 21, 2016. REUTERS/Stephane Mahe/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE - SEARCH 'BUSINESS WEEK AHEAD MAY 9' FOR ALL IMAGES

An image taken with a thermal camera shows the shut down nuclear power plant in Biblis, southwest Germany, in this March 22, 2011 file photo. The picture does not show any temperature difference outside the power plant. REUTERS/Kai Pfaffenbach/Files

An hostess shows a thermal image in a Caterpillar S60 smartphone during the Mobile World Congress in Barcelona, Spain February 25, 2016. REUTERS/Albert Gea

An hostess shows a thermal image in a Caterpillar S60 smartphone during the Mobile World Congress in Barcelona, Spain February 25, 2016. REUTERS/Albert Gea

An hostess shows a thermal image in a Caterpillar S60 smartphone during the Mobile World Congress in Barcelona, Spain February 25, 2016. REUTERS/Albert Gea

An Afghan woman and her son wear a thermal blanket shortly after arriving at a beach in a raft overcrowded with migrants and refugees in the Greek island of Lesbos, November 20, 2015. Balkan countries have begun filtering the flow of migrants to Europe, granting passage to those fleeing conflict in the Middle East and Afghanistan but turning back others from Africa and Asia, the United Nations and Reuters witnesses said on Thursday. REUTERS/Yannis Behrakis TPX IMAGES OF THE DAY

A Syrian refugee girl covers herself with a thermal blanket after arriving on the Greek island of Lesbos, November 6, 2015. Since the start of the year, over 590,000 people have crossed into Greece, the frontline of a massive westward population shift from war-ravaged Syria and beyond. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY

Somali migrants are wrapped with thermal blankets following their arrival on an overcrowded dinghy on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures. REUTERS/Dimitris Michalakis TPX IMAGES OF THE DAY

A migrant woman hugs a baby wrapped with a thermal blanket as she arrives on an overcrowded dinghy on the Greek island of Lesbos after crossing a part of the Aegean Sea from the Turkish coast, September 30, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures. REUTERS/Dimitris Michalakis TPX IMAGES OF THE DAY

A Syrian refugee and a baby are wrapped with thermal blankets moments after arriving on an overcrowded dinghy on the Greek island of Lesbos after crossing a part of the Aegean Sea from the Turkish coast, September 28, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures. REUTERS/Dimitris Michalakis TPX IMAGES OF THE DAY

Afghan refugee child Elias, 2, from Kabul wears a thermal blanket moments after arriving on a dinghy on the Greek island of Lesbos, September 4, 2015. European Union officials are preparing to push EU governments to take in many more asylum-seekers from pressured frontier states, including Hungary, and seeking to overcome resistance to a quota system in eastern Europe. REUTERS/Dimitris Michalakis TPX IMAGES OF THE DAY

Passengers wrapped in thermal foil blankets given out by emergency services after their Eurostar train was stranded at Calais Station, after intruders were seen near the Eurotunnel, in Calais, France September 2, 2015. Hundreds of passengers were stranded for hours on five Eurostar high-speed trains after reports that migrants were blocking the tracks leading to the tunnel under the English Channel and were attempting to climb aboard. REUTERS/John Pullman TPX IMAGES OF THE DAY

A young Syrian girl is wrapped with a thermal blanket at the port of the Lesbos island in Greece, following a rescue operation, August 21, 2015. Nearly a quarter of a million migrants have crossed the Mediterranean to Europe this year, according to the International Organisation for Migration. About half have come to the Greek islands, with numbers surging in the summer when calmer weather makes the voyage marginally less risky. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY

A young Syrian girl is wrapped with a thermal blanket at the port of the Greek island of Lesbos, following a rescue operation, August 21, 2015. Nearly a quarter of a million migrants have crossed the Mediterranean to Europe this year, according to the International Organisation for Migration. About half have come to the Greek islands, with numbers surging in the summer when calmer weather makes the voyage marginally less risky. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY